Coupling spin defects in hexagonal boron nitride to titanium dioxide ring resonators.

Publisher:
ROYAL SOC CHEMISTRY
Publication Type:
Journal Article
Citation:
Nanoscale, 2022, 14, (40), pp. 14950-14955
Issue Date:
2022-10-21
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Spin-dependent optical transitions are attractive for a plethora of applications in quantum technologies. Here we report on utilization of high quality ring resonators fabricated from TiO2 to enhance the emission from negatively charged boron vacancies (VB-) in hexagonal Boron Nitride. We show that the emission from these defects can efficiently couple into the whispering gallery modes of the ring resonators. Optically coupled VB- showed photoluminescence contrast in optically detected magnetic resonance signals from the hybrid coupled devices. Our results demonstrate a practical method for integration of spin defects in 2D materials with dielectric resonators which is a promising platform for quantum technologies.
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